First valid MVC structure (very basic, need lot of work and discussion)
Merge branch 'master' of https://github.com/kankoli/to-do-manager.git

Conflicts:
	todo_53V3N/bin/model/DataModel.class
	todo_53V3N/bin/view/main_window/TaskRow$2.class
	todo_53V3N/bin/view/main_window/TaskRow$3.class
	todo_53V3N/bin/view/main_window/TaskRow$4.class
	todo_53V3N/bin/view/main_window/TaskRow$5.class
	todo_53V3N/bin/view/main_window/TaskRow.class
	todo_53V3N/bin/view/main_window/ToDoMainFrame.class
	todo_53V3N/bin/view/main_window/ToDoMainMiddlePanel.class
	todo_53V3N/bin/view/new_category_dialog/AddCategoryDialog$4.class
	todo_53V3N/bin/view/new_category_dialog/AddCategoryDialog.class
	todo_53V3N/src/view/main_window/ToDoMainFrame.java